The noise was it from the top or inside the oven?
Did it stop when you turned the oven off or did it carry on for a bit?
The squeaking was from the fan at the back of the oven compartment. It stopped when everything else stopped working.
Ok that's fine. I take it the clock is set and not just flashing?
Yes the clock is set.
Ok if the clock is set but nothing is working then its possibley the safety card in there is the fault.
As in these you have the display board then the main power board and next to the main power board is a small circuit board. This is the safety card and ive replaced loads of these in the past for faults like this. As it can cut all power to the elements and motors.
Now you are proberly going to need to replace the safety card in there to get this back to normal again.
But as to the noise this is going to be the fan motor inside the oven and again this will need to be replaced to cure the noise in there.
If you need anymore info just get back to me.